U.S. Republican Senate candidate Marco Rubio (L) waves beside his daughter Amanda during his victory speech at a rally in Coral Gables, Florida, Tuesday. Rubio and fellow winning tea party candidates Rand Paul and Marco Rubio have helped propel the GOP to the top of midterm elections.

Atlanta — Concerns that the nascent tea party movement would hamper a return to relevancy for Republicans are quickly giving way as Election Day results suggest that in fact, the decentralized conservative protest movement helped give the GOP a roadmap to success.

"The biggest tea party is today," said Sen. Jim DeMint, a big tea party favorite, in a victory speech in his homestate of South Carolina. On Tuesday night, Rand Paul, a Senate candidate from Kentucky, called his victory a "tea party tidal wave."

But more importantly, the tea party, which at first worried and, frankly, scared both Democrats and mainstream Republicans, helped to give roiling anger over the economy and stubbornly high unemployment figures a national vent. Exit polls Tuesday gave the GOP a clear edge on turnout and passion, pointing the way for a Republican-controlled House of Representatives.

Of course, the general depressive effect of the economy on Democrat turnout, an unpopular health-care bill, and President Obama's own leadership stumbles played big roles in Republicans' quick reversal of the Democrats' coalescing victory in 2008.

Though scorned by many liberals, the loosely organized tea party – which has among its principles an audit of the federal reserve, repeal of the national health-care law, and tax cuts – managed to capture the mood of the country, with some polls indicating that as many as 48 percent of Americans had a somewhat positive view of the movement.

"The Tea Party victories by Rand Paul of Kentucky and Marco Rubio of Florida, underscored the extent to which Republicans and Democrats alike may have underestimated the power of the Tea Party, a loosely-affiliated, at times ill-defined, coalition of grass-roots libertarians and disaffected Republicans," writes Michael Cooper in the New York Times.

To be sure, some Republicans, including former Bush strategist Karl Rove, have scoffed at the unpolished caliber of candidates – including Ms. O'Donnell in Delaware – the tea party has supported in some races. (O'Donnell's loss could contribute to the Senate remaining in Democratic hands.) And it's still far from clear to what extent tea party-linked candidates will be able to force Congress to hold the line on government spending once they're in office.

But during the vociferous health-care debate and after the surprise election of Scott Brown to Sen. Ted Kennedy's Massachusetts seat in February, many Republicans chose to embrace the cantankerous and often unwieldy tea party message going into Tuesday's election.